Ahead of the funeral of Queen Elizabeth II on Monday afternoon, the Royal Family are going through a number of pre-rehearsed routines.
The body of the former monarch is now lying in state in Westminster Hall with thousands of people queuing up to pay their respects in London.
Hundreds of thousands of people are expected to walk past the Queen's coffin in the coming days in tribute.
READ MORE: The Queen's net worth when she died and the huge money King Charles now inherits
During her reign - the longest of any Royal Family head in history- the Queen had to follow a number of Royal rules which date back to long before her time on the throne.
Here are just a few things that we've learned that the late Windsor was advised against doing.
Touch other people
People of an older generation will remember the furore around Princess Diana when she shook hands and spoke with a number of people who were suffering with HIV in 1987.
There was equal surprise when Michelle Obama put her arm around the Queen during a visit in 2009 - something she later described as an "epic faux pas"
That's because touching members of the Royal Family is taboo - and isn't done very often.
Of course, the family members may initiate contact themselves, but as Reuters explained previously, the idea of 'common folk' interacting physically with a Royal is generally a no-no.
Dinner party decisions
The Queen was never allowed to choose who she spoke with at formal dinners.
It's been referenced in The Crown, but the Queen was always supposed to be speaking to the person on her right hand side.
Once that conversation came to an end, she would turn to her left and begin another.
This was explained by Lewis Hamilton of all people, who told Graham Norton: "The Queen said 'You speak that way first, and I'll speak this way, and I'll come back to you.''
Autographs
Seeing the signature of the likes of Prince William, Prince Harry, Meghan Markle or other members of the Royal Family is quite common - but we rarely saw the Queen's own handwriting.
Seemingly, the former monarch would only sign her name on cards - with one couple explaining how they opened a hand-written card from her on the day she died.
Tricia and Ray Pont from Godalming, Surrey, celebrated their 60th wedding anniversary on Thursday and told the BBC: "I was so excited to open the card. I thought it would be such a lovely moment for our family.
"It makes the card even more precious and poignant as we were one of the last people to get correspondence from her."
PDAs
Plenty of Royal couples shared a smooch or two on the iconic Buckingham Palace balcony.
William and Kate, Harry and Meghan and even Andrew and Sarah Ferguson back in the day were known to show affection in public, but Elizabeth and her late husband Prince Philip rarely did.
In 1953, Philip pecked the Queen during her coronation. And, in 1991, he kissed her on the cheek during New Year celebrations
Bar that, we never really saw any show of affection from the pair.
Sitting with her legs crossed
Going back to referencing the Crown, one of the famous scenes in the Netflix show is Diana Spencer having to learn about Royal etiquette.
This goes all the way down to how members of the Firm are meant to sit - with female members told to use a position known as the 'Duchess Slant' which sees their knees tucked beside each other and leaning to one side with a diagonal slant.
The Queen herself once remarked on a visit to Tonga: "The only thing I found difficult was sitting cross-legged.
"It's quite painful for people who are not built in the same direction."
Sitting on another throne
A rare one, but a rule nonetheless - the Queen wasn't allowed to sit on another monarch's throne.
Of course, there was no reason for her to do so, but there was one humorous moment when she visited the Game of Thrones set.
Famously, the HBO series was all based around the Iron Throne, and the Queen eyed up the seat during her tour.
Maisie Williams (aka Arya Stark) explained on Hot Ones: "She sort of looked at it and said, 'That doesn't look very comfortable.' We all just sort of smiled and were like, 'Is she going to do it?'"
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